Remove Alt-Svc parser on browser-wasm. (#52681)

Contributes to #44534

diff --git a/src/libraries/System.Net.Http/src/System.Net.Http.csproj b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
index f4d78fe..bb634a2 100644 (file)
--- a/src/libraries/System.Net.Http/src/System.Net.Http.csproj
+++ b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
@@ -29,8 +29,6 @@
     <Compile Include="System\Net\Http\EmptyReadStream.cs" />
     <Compile Include="System\Net\Http\FormUrlEncodedContent.cs" />
     <Compile Include="System\Net\Http\HeaderEncodingSelector.cs" />
-    <Compile Include="System\Net\Http\Headers\AltSvcHeaderParser.cs" />
-    <Compile Include="System\Net\Http\Headers\AltSvcHeaderValue.cs" />
     <Compile Include="System\Net\Http\Headers\KnownHeader.cs" />
     <Compile Include="System\Net\Http\Headers\HttpHeaderType.cs" />
     <Compile Include="System\Net\Http\Headers\KnownHeaders.cs" />
@@ -137,6 +135,8 @@
   <ItemGroup Condition="'$(TargetsBrowser)' != 'true'">
     <Compile Include="System\Net\Http\HttpHandlerDefaults.cs" />
     <Compile Include="System\Net\Http\HttpMethod.Http3.cs" />
+    <Compile Include="System\Net\Http\Headers\AltSvcHeaderParser.cs" />
+    <Compile Include="System\Net\Http\Headers\AltSvcHeaderValue.cs" />
     <Compile Include="System\Net\Http\Headers\KnownHeader.Http2And3.cs" />
     <Compile Include="System\Net\Http\SocketsHttpHandler\AuthenticationHelper.cs" />
     <Compile Include="System\Net\Http\SocketsHttpHandler\AuthenticationHelper.Digest.cs" />

diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/KnownHeaders.cs b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/KnownHeaders.cs
index ccccd5e..5ec2c43 100644 (file)
--- a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/KnownHeaders.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/KnownHeaders.cs
@@ -26,7 +26,7 @@ namespace System.Net.Http.Headers
         public static readonly KnownHeader AccessControlMaxAge = new KnownHeader("Access-Control-Max-Age");
         public static readonly KnownHeader Age = new KnownHeader("Age", HttpHeaderType.Response | HttpHeaderType.NonTrailing, TimeSpanHeaderParser.Parser, null, H2StaticTable.Age, H3StaticTable.Age0);
         public static readonly KnownHeader Allow = new KnownHeader("Allow", HttpHeaderType.Content, GenericHeaderParser.TokenListParser, null, H2StaticTable.Allow);
-        public static readonly KnownHeader AltSvc = new KnownHeader("Alt-Svc", HttpHeaderType.Response, AltSvcHeaderParser.Parser, http3StaticTableIndex: H3StaticTable.AltSvcClear);
+        public static readonly KnownHeader AltSvc = new KnownHeader("Alt-Svc", HttpHeaderType.Response, GetAltSvcHeaderParser(), http3StaticTableIndex: H3StaticTable.AltSvcClear);
         public static readonly KnownHeader AltUsed = new KnownHeader("Alt-Used", HttpHeaderType.Request, parser: null);
         public static readonly KnownHeader Authorization = new KnownHeader("Authorization", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.SingleValueAuthenticationParser, null, H2StaticTable.Authorization, H3StaticTable.Authorization);
         public static readonly KnownHeader CacheControl = new KnownHeader("Cache-Control", HttpHeaderType.General | HttpHeaderType.NonTrailing, CacheControlHeaderParser.Parser, new string[] { "must-revalidate", "no-cache", "no-store", "no-transform", "private", "proxy-revalidate", "public" }, H2StaticTable.CacheControl, H3StaticTable.CacheControlMaxAge0);
@@ -107,6 +107,14 @@ namespace System.Net.Http.Headers
         public static readonly KnownHeader XUACompatible = new KnownHeader("X-UA-Compatible");
         public static readonly KnownHeader XXssProtection = new KnownHeader("X-XSS-Protection", HttpHeaderType.Custom, null, new string[] { "0", "1", "1; mode=block" });
 
+        private static HttpHeaderParser? GetAltSvcHeaderParser() =>
+#if TARGET_BROWSER
+            // Allow for the AltSvcHeaderParser to be trimmed on Browser since Alt-Svc is only for SocketsHttpHandler, which isn't used on Browser.
+            null;
+#else
+            AltSvcHeaderParser.Parser;
+#endif
+
         // Helper interface for making GetCandidate generic over strings, utf8, etc
         private interface IHeaderNameAccessor
         {